Materials that change color in response to external stimuli can cater to diverse applications from sensing to art. If made flexible, stretchable and weavable, they may even be directly integrated with advanced technologies such as smart textiles. A new class of engineered composite based on polydiacetylene (PDA) functionalized carbon nanotubes (CNT) shows tremendous potential in this regard. While the inherent multi stimuli chromatic response of the polymer (blue to red) is retained, the underlying conducting CNTs invoke electrochromism in PDA. Further, the fiber form factor of dry-spun CNT yarns facilitate direct weaving of large scale electrochromic fabrics, where current flow and thus color change can be accurately controlled. This review summarizes the fundamental aspects of CNT yarns and PDAs, focusing especially on their interaction chemistry which results in the scientifically and commercially appealing electrochromic transition in these hybrids.

响应外部刺激而改变颜色的材料可以满足从传感到艺术的各种应用。如果使其具有柔性，可拉伸性和可编织性，它们甚至可以与智能纺织品等先进技术直接集成。基于聚二乙炔（PDA）功能化的碳纳米管（CNT）的新型工程复合材料在这方面显示出巨大的潜力。虽然保留了聚合物固有的多刺激色响应（蓝色到红色），但下面的导电CNT在PDA中引起电致变色。此外，干纺CNT纱线的纤维形状因数有助于大规模电致变色织物的直接织造，在该电致变色织物中可以精确地控制电流流动并因此可以控制颜色变化。这篇综述总结了CNT纱线和PDA的基本方面，